Code locking device for the steering pillars of cycles



H. E. DAKIN.

CODE LOCKING DEVICE FOR THE STEERING PILLARS 0F CYCLES.

- APPLICATION FILED 020.24. I920.

, 41 1,168. Patented Mar; 28, 1922.

UNITED STATES PA E T. OFFICE.

HERBERT Brenner naxin, or Lennon, ENGLAND, l ssrenon To HERBERT a. name "LIMITED, 01? mmi'onnnemmn, AconroaA'rroN or GREAT BRITAIN.

I oonn Locifiire roa mnswmmasmmas or crows. 1

Limes. i

To all Mam a ma concern:

Be a known a 't I. Hana: Emma London, IV. C. 1 England, have inventedan Improved Code Locking Device for the Steering Pillars of Cycles, of which the following isa specification;

This invention relates. to a code locking device for the steering pillar of a cycle and consists in an improved construction of lock designed to be readily fixed into the steering head of the cycle through which head the bolt of the lock protrudes and engages the steering pillar. A furtherfeature of the invention consists in an improved method of'mounting the bolt Within the lock so that the bolt cannot be pulled outwardly whilst the code locking rings are turned with the object of feeling for the channels in the code rings, thereby ascertaining the combination of letters or numerals forming the code for releasing the bolt. v I

According to this invention the outer end of the locking bolt is enga ed by a rotatable cap in such a manner t at rotation of the cap imparts arectilineal movement to the bolt. The rotatable cap is mounted in a sleeve which contains the bolt and said sleeve is screwed into the steering. head, a washer being employed to providea bearing surface for the adjacent code ring of the lock.

A look constructed according to this invention is illustrated in the accompanying drawing in which, I T

Fig. 1 is a longitudinal section, and

Fig. 2 a cross section on line X-X of Fig.

Fig. 3 is a side elevation of the locking device. 7

The lock consists of a sleeve a formed with a reduced end or plug a adapted to be screwed into the steering head A of the cycle frame and on this sleeve are rotatably mounted the'rings (l (1 bearing the numerals or letters of the code. A washer c is employed to provide a bearing surface for the innermost of the concentric rings (2 d, which are rotatably mounted on the sleeve (1. The outer end of the sleevea is formed with a head a forming a fixed index by which the code can be set as hereinafter described.

The interior of the sleeve a is formed to receive the locking tongue or bolt e provided inner end of the bolt 6 to Specification of Letters Patent. latente'd fil ng-'28 1922. I

with projecting pins e which pass through grooveor g'r'udevtff formedinthesleeve a and enter the annular groove d d in the e islarger in diameter than the inner end and is formed with a screw-thread which is engaged by a screw cap f mounted rotatably I in the end of the sleeve a and held against longitudinal movement by a spring ring f.

The rings (Z (Z' and the head a of the sleeve a are marked with numerals or letters. from which the code is formed by means of which the steering head is locked or unlocked. e I When it is desired to lock the steering pillar B the rings cl d are adjusted relatively to the fixed'head a to form the code. The slots d in the rings will now be in alignment and provide a free passage for the pins 6'. Upon the screw cap 7 being rotated the locking bolt e willbe caused to travel longitudinally of the sleeve a, causing the project beyond the end a of the sleeve and enter ahole provided in the steering pillar B thus locking same to the head A, as illustrated in Fig. 1 of the drawings. The rings at 03 may now be turned indiscriminately to disturb the code.

.'In code locks of the type above described the. bolt is commonly formed integral with a head whereby the bolt is withdrawn. In such ,a case if a person desired to ascertain the code for releasing the bolt he pulls the bolt and turns each ring until he feels that the corresponding pin of the bolt is no longer pressed against the ring which indicates the slot (1 in the ring is opposite to the pin. In this manner he is enabled to arrange the code rings so as to release the bolt. In my improved construction the bolt cannot be pulled outwardly. owing to the interposition of the spring f between the sleeve and the cap, and therefore a person cannot pull the bolt to ascertain the position I of the code rings to release t e bolt.

iiiig's (Id. The outer end of the locking bolt,

What I claim as my invention and desire to secure by Letters Patent is 1. A locking device for the steering pillar of a cycle, comprising a slotted sleeve screw threaded for attachment to the steering pilhr of the cycle, code lock rings mounted'on said sleeve, a locking bolt screw threaded at the said code lock rings and the steering pillar and forming a bearing surface for the innermost code locking rings; a rotatable cap provided with a screw threaded recess on its inner face eng: ing with the screw threaded outer end o "the said locking bolt, and means for. holding the said rotatable cap against longitudinal movement, wherebly t to: the 'steeringhead of a cycle, a screw threaded bolt sliding in 'said sleeveg a lota- 15 table cap mounted on the outer end of said sleeve'and having ascrew .threadedrecess enga ing said bolt and Whereby' 'said bolt may escrewedbackand forthin. saidsleeve, said'sleeve and rotatable caphavi'ng grooves in their adjacent faces,, a spring-locking ring lying in said grooves in the sleeve and rotas tablecap, to hold thelatter against longitudinal movement; and code controlled means mounted on saidsleeve for controlling said 25 screwed bolt, substantially as described,

v HERBERT ERNEST DAKIN, 

